Question

What is the answer of 1/7√2+3√5

Answer 1

Answer:

cannot be solved because the roots are different

Answer 2

Solution:

1/(7√2+3√5)

Rationalising denominator, we get

= (7√2-3√5)/[(7√2+3√5)(7√2-3√5)]

= (7√2-3√5)/[(7√2)²-(3√5)²]

= (7√2-3√5)/(98-45)

=(7√2-3√5)/53

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